Finding the Fourth Proportional to 13,111.52, 19,617.96 and 7,272.32

Step by Step Solution

1. Step 1: Write the proportion equation
   13,111.52 : 19,617.96 = 7,272.32 : x
2. Step 2: Convert to fraction form
   13,111.52/19,617.96 = 7,272.32/x
3. Step 3: Cross multiply
   13,111.52x = 19,617.96 × 7,272.32
4. Step 4: Simplify right side
   13,111.52x = 142,668,082.87
5. Step 5: Solve for x
   x = 142,668,082.87/13,111.52
6. Step 6: Final answer
   x = 10,881.12